Spark-plug.



Application led Tanuary i To all toltomit Imay Concern: A

le it. known that l, CHAnLns l. JonNsoN,

a Citizen ot' the United Staten ot merifa,

reaidinn' at the cit)7 and county of Denver. a and State of Colorado, hare inve ted a new and usetul Spark-Plug, of which the following is a specification.

My invention relates to improvements in spari; plaga, and the ohjeete ot my invention are: Firstto provide a self-cleaning spark plug that an automobile' chautl'eur or a gasolene engine ope 'ator can manipulate in a ten' seconds to cause it to thoroughly clean itself hy the expansive torce of the explosions ot.t the explosive mixture or' ,frase/lelie, engines. Second-4o provide a spark plug that is arranged to he manipulated to pei mit a ipiantit) ot thoryaste `L'a that result lfrom the enplohiony ot" explorire mixtures in gaaolene engines to enc: pe to the atmosphere. yThird-to provided with a valve controlled exhaust port. luuling 'trom its,I IQparl xgap end to the atmosphere and arranged to compel the exhaust` rases ot' the explosive charge of ai engine to tlon' in contact with the spark grap, and clean them of `sont)v and guminy auhstanee h v its explosive toreo.

l attain these objects; hy the mechanism illustrated in the accompanying drawings, in which:

Figure l is a Side eleva-tion olf the. improved Spark plug7 showing the saine in connection .fith a, portion ot1 an engine cylinder. liin. 2 in a `fert'imil, sectional View thereon the outlet valve heilig elosed. Fig. 3 is an elevation; part ly in hection, of the Same,I showing the i'alre opened; and Fig. 4 is i horizontal, lsectional View on the lino 441 o liig. 2.

Similar letteral or" reference refer to similar pa rtak throughout the everal ViewS.

ltet'errinn' to the drawinga the numeral l designates` the porcelain` non-eornluetiveportion ot the core of my improved selteleaninf; spark plug. This non-nonduetive portion 'is in use in the spark plugs in common use and forms a cmiperating element of my invention. 'l`his` iam-conductive portion comprises a long body portion having a raised collar portion 2 intermediate of its ends and terminating` in a conieal pointed end portion at one end and a Square end portion at. its oppositeend. fr small aperture 3 is formed through 'the Center of this por Specenton o Letters Fatt-,nt

7, wir.

l .post l thread a cheek nut t.

-extencled through the axial t i provide a apart; plug` Serial No. 05,959.

tion in which insert a circuit. sparh formingterminal; an use for this purpoSe auf." preferably,Y nahe and arranf' spart: making wire aa follow-i.V z wire of rsutiioient diameter at is provided Vwith a threaded e' l term a hinding post.y and threaded hinding post portioi drawn down anialier in (lian "t vided with a eollar 7, adiaeei end. rlhe reduced portion ot tVl porcelain portio end portion ag' and the collar i, th against. the conical en hy solder or other Washer nuti tt; which is ii material7 then screwed -onto the endotth-g'i ire againat the attuare i Wire is lruyee'eined to the poroeln eore between its nut and col1A and eonduetii'ebinding pf.

ate 4 threaded to the threaded end ot ine is adapted to elanip the terminal l current carrying wire against tao co1: i washer nut.

Upon the lower' end portion o' t` 235 lain part of the core l place hushin 1t), which is provided with ture of' two dilierent nianiet= the smaller one ilt ot.xr wtf; snoei);v over the toni 'al 'e l porcelain adjacent to the iin collar portion of the porcelain core, The axial aperture ot.I Sleeve is made enough larger than the'eollar portion o'tf they po extend loosely over it and is threaded` and conductive packing r and iat of Copper or other sui a' i are plaeed around the opposite en porcelain part of thecore agiaiiwt site ends ot its collar portior der 15 in the bottom of tl e i.. L the bushing sleeve engag 13 and is clamped collarhy a hashing vided with l "oo over the binding; termin. lain and ie tl'n bushing sleeve and near ring il and clamp 1t; 1

end of the collar portion of the porcelain. porting bushing troni its terminal end to the The bushing sleeve isthus tightly but relower end ot the inner threaded aperture inovably clamped to the porcelain pr t. portion of the opposite end of the plug sup- To the lower end of the bushing sleeve porting bushing in which the bushing sleeve connect at one side of its diainetrical center screws, and at the junction ot this tapering 7a the opposite ends 17 ot a bent conductive chamber and .the bottoni of the threaded ivire. This bentiivire extends to the end of aperture a shoulder 2S is formed, and this the circuit spark wire of the non-conductive shoulder is arranged and adapted to form a portion of the core,'and is providedy with a seat tor the adjacent end otl the bushing l@ sinall curved end portion, which is bent over sleeve which is formed to bear against it. 75 at right angles to the lengths of the ends of I preferably toi-in a tapering or slightly the bent Wire and is arranged to extend todownwardly beveled seat portion and pro- Wardv the end of the axiahcircuit spark Wire vide the adjacent end of the bushing sleeve ot the porcelain, and close enough to it to with a plug shaped taper end registering l5 leave a space or gap of sufficient size toperwith the taper scat of the plug supporting 8o mit a spark to torni between the end of the bushing and arrange the bushing sleeve so circuit spark Wire ot the porcelain and the that it `vill screw down against its seat and `curved end of the bent Wire. In Fig. 1 this .prevent any exhaust explosive gases from bent Wire and its loop is shown in side eleworking by this seat, except when it dc- 20 Vatiom sired to clean the spark plug wires, as will S5 vThe outer surface of the bushing sleeve is be explained hereinafter. Adjacent to this provided Witl'ral thread 19 from its end porseat of the plug supporting bushing I forni tion adjacent to the spark gap wires to through its shell one or more small aper.- near its opposite end, which is Jformed into tures 30, preferably using and illustrating Wrench receiving surfaces 20, and to this 'six of these, which I preferably arrange at 9G outer threaded surface of this bushing sleeve equal distances apart in the squares of the I thread a bushing 21, Which I term the hexagonal surface ot the plug supporting spark plug supporting bushing, which is bushinf. These apertures forni 'exhaustadapted to be secured to the explosion ends ports to the atmosphere for the of cxot explosive mixture actuated engines in a plosion when the bushing sleeve plug end is 95 'position to permit the spark plug to ignite unscrewed and is thus lifted from its seat. the explosive charge. This attaching bush- The plug shaped end ot" the bushing sleeve ing comprises a hexagon or other suitable and the taper seat and exhaust gas aperture wrench receiving end portion and a collar and the exhaust ports leading to the atnif i portion Q3 at the inner end ofthe hexagon phere through the 'plug bushing form a 10G portion. Adjacent to the collar portion valve controlled exhaust passage for the there is an outside threaded portion 2a of gases of the explosions in the cylinder, and sufficiently smaller diameter to permit the the' entrance`to this valve controlled exhaust adjacent `side ot the collar to act as a flange passage is arranged around and in such close 4@ against the sur-tace ot" the cylinder the bushproximity to the spark gap of the electrodes 105 ing is screwed into. Below the 'outside that when the exhaust port is opened the exf threaded portion the bushing is 'provided pansive force of the explosionr drives the u'ith a reduced portion that tapers toits gases in direct contact with the Wires and end. This bushing is also provided 'with an cleans them ot all sooty, sticky, gurniny and 35 axial threaded aperture Q6 that extends into other material that they collect and which il() it from its hexagon end and is arranged and causes theni to frequently miss sparking and adapted to permit the bushing sleeve to nally become inoperative .to ignite an exscrew into it, and troni the hott-om of the plosive charge withinthe cylinder. u threaded aperture in the plug supporting Theoperation is as t'ollowszThe sparltj'ilug 00 bushing I t'orin a conical tapering axial supporting bushing is threadedljT secured 115 aperture .27 that extends to the end of `this to the explosive end of agasolene engine, plug supporting lousl'iing.4 The tapering inas shown in `Fig. 2, and the core comprising ner end of this plug supporting bushing is the l'iushingrsleeve and the porcelain center made long enough to extend below the adjaare inserted in it, the bushing sleeve being cent end ot the core a short distance but ter threaded into it7 with its valve end down 120 minates at a short distance above the spark tight against the valve seat Q8 ot the plug' gap loop of the spark Wires, and is provided supporting bushing, thus closing the ex- Wilh a conical axial aperture that is made haust passage from the interior ot" theexsulliciently larger in diameter than the adplosive end ot the cylinder to the atnios is@ jacent taper, conical end of the non-tion.- phcrc. An electric circuit wire is' then eon- 122' ductive portion of the core to toi-m an open 'nc-Lied to the binding poet byplaffing its end y/space all around it and liefwcen it and the around the post between the binding postfs` conical end oi' the plug support ing' husiing, nut S) and the tixed ivashernut t3 andlightenq which I terni the r. hast chamber, This l ing the binding posts nut against the end of 5,5 exhaust chamber extends into the plug sup i the wire. 'Iheelectrie current then flows @30 readers through the central electrode and sparks across the gap between the end ot this wire and the loop of the loop wire, and tlows through the bushings and casing of the engine to any suitable electrically arranged spark timing` device or mechanism that it is desired to use on the engine and which l do. not illustrate, as there are a number of different spark timing devices in common use, and it does not. form a part of my present invention. rThe chauffeur or operator of an engine or of an automobile engine provided with my self-cleaning siiarl; plug when he desires to clean the plugapplies z' wrench tothe wrench receiving surfaces of the bushing .sleeve and 'unscrews it out of the plug supporting bushing tar enough'eto litt its valve end from the seat and at the same time uncovering the aperture 27 leading from this valve seat to the atmosphere, when the gases that result from the explosion are forced at each explosion with great Jtorce against the spark gap of the wire and into and through the conical exhaust chamber and passage by and between the valve seat and the valve end of the bushing sleeve into and through the exhaust apertures 30 to the atmosphere, cleaning the wires of any and all accumulation of material detrimental to their continuous and positive sparking tunetion. The operator having blown out and cleaned the wires and adjoining end of the spark plug screws the bushing sleeve downuntil its valve end engages its seat and closes the exhaust port and allows the engine. to run untilhc again desires to clean the spar'` ing wires, when he again opens and cls the bushing valve, and he can instantly at any time or place clean the spark wires by unscrewing the bushing sleeve enough to open, thus opening for a t'ew seconds its valve without stopping the engine.

dy invention contemplates the tfnxning ot' gas exhaust passageway to direct the gases ot the explosion ot' explosive mixtures to flow in direct contact with the spark mal-:ing wires and its passage from the explosive cylinder' to the atmosphere to clean them of any and all material that interferes with the `tiow of the electric current through them in such` an operative manner as to insure that they will be in operative spark producing order; and, while l have illustrated and de'- scribed the preferred arrangement or" my invention, l do notwish to be limited to the construction and arrangement shown, as many changes might be made without departino from my invention.

Having described my invention, what l claim as new and desire to secure by lictters Patent is:

l. lspark-plug comprising a core having a non-conductive portion provided with one terminal, a bushing provided with a threaded aperture at 'its outer end, its inner end' being spaced from said non-conductive portion to term an exhaust-chamber and having a valve-seat portion between its threaded end and exhaust-chamber portion and a spark-gap wire attached to said core and extending' through said. chamber, said bushing having one or more gas-exhaust apertures therethrough loeatechoutside said valve-seat, said core having a threaded member engaging the outer threaded end of the bushing, and a. valve formed by said core arranged to cooperate with said valveseat to closeitihe outer end of said exhaust-chamber.

2. A spark-plug comprising a core havin(r a non-conductive portion provided wit-h one terminal, a bushing provided with a threaded aperture-at its outer end, its inner end bemg spaced fromY said knon-conductive portion to Jform an exhaust-chamber and having a valve-seat portion between its threaded" ortlon and a end and exhaust-chamber spark-gap wire attached to said core and eX- tending through said chamber, said bushing having one or more gas-exhaust apertures therethrough located outside said valve-seat, said core having a. threaded member engaging the outer threaded end of the bushing arranged to carry said non-conductive portion and adapted to cooperate at its inner end with said valve-seat to close the out-er end of said e:\;haust-chamber.

spark-plug comprising a core having a. non-conductive portion provided with one terminal, a bushing provided with a threaded aperture -at its outer end, its inner end being spaced from said non-conductive portion to form an exhaust-chamber and havji ing a valve-seat portion between its thread? ed end and exhaust-chamber portion and a spark-gap wire attached to said core and eX- tendingthrough said chamber, said bushing having one or more gas-exhaust apertures therethrough located outside said valve-seat, said core having a threaded member engaging` the outer threaded end ot the bushing, an annular plug movable within said threaded member and ar anged to maint-ain the non-conductive portion in carrying engagement therewith.l and said threaded member aoaptcd-to coperate at its inner end with said valve-seat to close the outer end of said exhaust-chamber.

4. A spark-plug comprising a core having a non-conductive portion provided with one terminal, a bushing provided witha threaded aperture `at its outer end, it-s inner end being spaced from said non-conductive portion to form `an exhaust-chamber and having a valve-seat portion and a Vspark-gap wire attached to said core and extending through said chamber, said bushing having one or more gas-exhaust apertures therethrough located outside said valve-seat, said wiih said valve-seat o dos@ ihe outer and i0 of said xhuusbcimmbei.

In tesiimmiy whereof affix my gignsiture in pxch'fenf'o of tw@ wihicsSCS.

CLRLES E. JHNSON.

Witnesses:

l SAMEN fi' LLio'iT, DELLA M. FUWLE. 

